This is not an easy one to watch, long spaces of dialog, some poor acting and not enough good campy acting, etc. I can't say I hated the movie, I did laugh at a lot of parts, but ultimately it was nothing memorable. Bruce Dern looks stoned in most his scenes and sometimes cannot be understood because he's mumbling. Casey Kasem has a surprising amount of work to do in this film compared to other films I've seen him in like "Angels Unchained". Surprisingly, he's not that bad. Unfortunately it's one of the few surprises in the film.
The plot is very stale 1930s era mad scientist hokum. It's pretty sad when you have to say that "The Thing with Two Heads" is a relatively creative movie, but it's true when compared to this one. The plot is identical with "Donovan's Brain" and any number of generic mad scientist plots. Dern is a guy who has developed a technique for grafting one animal's head on another animal. DJ Kasem plays a doctor (although, oddly enough, whenever you hear a DJ on the radio in the film Kasem provides the voice for the DJ as well) who is an old college friend of Dern's, and Dern shows him his laboratory set-up with all its two headed rodents, monkeys, foxes, and rabbits, declaring his intention to soon use it on humans. Kasem seems oddly unalarmed, simply exchanging pleasantries with the wifey and Dern and promising to come up and visit at a later point in the film. The human experiment subject ends up being a brain damaged worker on Dern's ranch, whose father has just been killed by a homicidal rapist. Neither Dern nor his assistant (Berry Kroeger, who had a very suitable face kind of reminiscent of Peter Lorre's) seems to think about the fact that if they put a psychotic head on another person's body, they will simply create a psychotic monster. Didn't they ever watch "Frankenstein"? Geez! BAD BRAINS! Speaking of the psycho killer, Al Cole who I believe played him has to be one of the worst actors I've seen in a relatively "big" B movie like this. If the movie ever had any chance of working as a scary movie, Mr. Cole's unbelievably over the top performance would have ruined that. His way of communicating his lust is to literally lick his lips and bulge his eyes out. It's an embarrassing performance that could have been fixed sooner as soon as the first rushes came in, but the director either wasn't skilled enough or didn't care enough to fix the problem.
This film could have benefited somewhat from having its tongue a bit more in cheek. Everyone seems very serious, which would be fine if it wasn't such a tired plot and a standard script, standard direction, etc. There's really nothing scary about the monster anyway, the only people he kills are some bikers who nobody cares about in the first place and a couple schmoozing teenagers. In a film where the horror fails and there is no camp, you have basically a wasteland which would bore 99.9% of film viewers. The only laughs here are un-intentional and they are few and far between. There isn't a lot of gore or sex exploitation either, at least not in the print I saw which was actually an archival print. So not much to recommend here. Rent the one with Rosey Grier and Ray Milland instead, unless you're a big fan of Casey Kasem or Bruce Dern and you want a few cheap laughs sprinkled through an awful film.